VSL:SCIENCE // Just how strong are your closest friendships?

Friends come. Friends go. But according to a new study, the process is more turbulent than one might have imagined.

Utrecht University sociologist Gerald Mollenhorst asked 604 adults about their social lives, repeated the survey seven years later, and found that most people had replaced half of their friends over the course of that period. Moreover, only 30 percent of the subjects’ close friends remained close. Then again, given the turnover rate, how close could those friends have been in the first place?

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VSL:SCIENCE // Just how strong are your closest friendships?